Sad-iron heater.



W. H. VAN HORN. SAD IRON HEATER. APPLICATION FILED my 21. 1910.

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Patented Nov. 29, 1910.

W. H. VAN HORN. SAVD IRON HEATER. APPLICATION rum) MAY 27, 1910.

Patented Nov. 29, 1910.

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WILLIAM H. VAN HORN, 0F BALTIMORE, MARYLAND, ASSIGNOR T0 CLARENCE 1V1.KEMP, OF BALTIMORE. MARYLAND.

SAD-IRON HEATER.

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To all whom it may concern:

Be it known that I, WILLIAIMI H. VAN HORN, a citizen of the UnitedStates, residing at Baltimore, State of Maryland, have invented new anduseful Improvements in Sad-Tron Heaters, of which the following is aspecification.

This invention relates to a sad iron heater and has for its object toprovide a simple and economical heater for burning gas provided with anormally closed inlet valve adapted to be automatically opened for theadmission of gas to the burner when a sad iron is placed on suitablesupports arranged around the burner, and closed when the iron is removedtherefrom. The gas issuing from said burner when the valve is opened islighted by a suitably disposed pilot burner kept constantly lighted solong as gas flows to the heater.

With this and other objects in view the invention consists of the novelconstruction, combination and arrangement of parts hereinafter describedand claimed and illustrated in the accompanying drawings in which Figure1 is a plan view of the improved said iron heater and holder which mayform a part thereof; Fig. 2, a vertical sectional view on the line 22 ofFig. 1; Fig. 3, a similar view on the line 3-3 of the same figure; Fig.4, an elevation of the heater viewed from the left side thereof Fig. 1;Fig. 5, a horizontal sectional view on the line 55, Fig. 4; Fig. 6, aplan view of the valve casing and the several branch arms projectingtherefrom; Fig. 7, a vertical sectional view of the valve casing on theline 7-7 Fig. 6, and Fig. 8, a horizontal sectional view on the line 88,Fig. 7.

In the drawings, the numeral 14: indicates a horizontal table forsustaining a sad iron, one half of which 15, in the structure shown, isa flat plate and carries the burner 16, the other half 17, in the formof a grid and surrounded by a flange 18, serves as a holder for the ironwhen not in use. The table 14: is supported by a vertical standard 19rigidly mounted in a base 20 adapted to be fastened on a table or othersuitable article.

In the center of the plate 15 is a longitudinal depression or cavity 21forming a gas chamber fed by a pipe 22 opening thereinto from thebottom, see Figs. 2 and 3. Supported on a shoulder in the gas chamber 21near the top is the burner 16 made a gas Specification of LettersPatent.

Application filed. May 2'7, 1910.

Patented Nov. 29, 1910. Serial No. 563,772.

burner, as here shown in the form of a box open at the bottom andperforated at the top for the escape of gas, and fastened to the plate15 by bolts passing through said plate and through ears 23 projectingfrom the ends of the burner. Between the burner and the gas cavity is aperforated metal or wire gauze diaphragm 24 to prevent flareback of thegas. The burner hereinabove described is merely a type, as any approvedform of burner may be substituted therefor.

Integral with or attached to the plate 15 are a number of upstandinglugs 25 slightly higher than the top of the burner to support a sad ironand form a combustion space between the burner and the bottom of saidiron.

Beneath the plate 15 is a vertically disposed valve casing 26 containinga valve 27 for controlling the admission of gas to the burner 16.Projecting laterally from the valve casing above the valve seat 28 is atubular branch 29 having an upturned end 30 interiorly threaded toreceive the gas inlet pipe 22. W'hen the valve is opened gas flowsthrough the branch 29 to the burner. A second tubular branch 31 projectsfrom the valve casing 26 below the valve seat, and has an uprightextension 32 at its end threaded to receive a pipe 33 carrying on itsupper end a pilot burner 34; to ignite the main burner 16 whenever gasis admitted thereto. The branch 31 is provided with a valve 31 toregulate the quantity of gas flowing to the pilot burner.

The main gas pipe 35 bringing gas to the burners is screwed into abranch 36 connected with the valve casing 26 below the valve seat and indirect communication with the pilot burner branch 31 so as to keep thepilot burner constantly lighted while the heater is in use. At a rightangle to the branch 36 is a small branch 37 having a longitudinallythreaded hole 38 therein opening into a reduced passageway 39 connectingthe opening-in the branch 36 with the valve casing 26 just below thevalve seat 28. Screwed into the hole 38 is a plug valve 1O adapted to beturned by a suitable tool to increase or decrease the area of thepassageway 39 and thus vary the quantity and pressure of the gas whichmay pass to the main burner 16. The plug valve 40 is short and its outerend lies some distance within the threaded hole 38 to protect it frommeddlesome persons. A threaded bolt 41 is screwed upper and lower ends42 and 43 respectively of said'bore are approximately of the samediameter and connected about midway of the casing by a reduced portion44 which forms a guide for the stem 45 of the valve 27, said reducedportion leading upward from the valve seat 28. The upper end 42 of thebore forms a stuffing box 46 for the valve stem 45 which terminates in arounded head a short distance above the packing nut of the stufiing box,said nut also forming a guide for the valve stem. The lower end '43 ofthe bore is closed by a screw cap 47 in which is seated a spring 48arranged to press upwardly on the valve 27 and hold it against its seatto prevent gas passing to the burner 16. The lower end ofthe valve stem45 iscut away or otherwise reduced in size at 49, to permit gas from themain pipe 35 when the valve 27 is open, to enter the reduced portion 44of the bore around the valve stem and thence to the passageway in thebranch '29 communicating with the burner 16. p

The valve 27 is opened automatically by means of a pin 50 when a sadiron is placed on the lugs 25. This pin 50 slides easily in a verticalhole bored through a lug 51 on the upper side of the plate 15 andpreferably within the area circumscribed by the lugs 25. The lower endofthe pin 50 has an enlargement 52 that rests on the rounded upper end45 of the valve stem 45 and a head 53 on its upper end that projects ashort distance above the lugs 25. Then a sad ironis placed overtheburner, its lower side strikes the pin-and depresses it a shortdistance, pushing down the valve stem and openin 'the valve The gas thenpasses the reduce portion of the valve stem through the branch 29, pipe22, gas chamber 21 and through the burner 16 where it is lighted by thepilot burner 34. As soon as the iron is removed, the spring 48 which hadbeen compressed by the downward movement of the valve reacts, and closesthe valve on its seat, to shut off the gas, and through the valve stem,elevates the pin once more above the lugs 25.

' Constructed as above described the heater is simple and cheap;positive and automatic in its'op'eration, and economical in theme ofgas, as the moment an iron is removed from over the burner, the flow ofgas is stopped and, the flame extinguished. This reduces the quantity ofgas consumed and,

perhaps, the generation of heat in the room wvhere the heaters are used.Extinguishing the flame when not desired tendsto keep the atmosphere inthe room pure as less oxygen is consumed and less vitiated gases thrownoff as products of combustionj The right is reserved to change the exactconstruction and arrangement of the various parts of this inventionprovided the scope and spirit. of the claims are not exceeded.

What I claim is:

1. A heater of the class described, comprising a gas burner, means forsupporting above the burner an object to be heated, a valve casinghaving a through opening larger at its ends than at an intermediatepoint, a valve therein and having normally a bearing against a seat, aplug secured into one end of said casing and having a bore for a springto hold said valve seated, at stuffing box in the other end of saidcasing through which the valve stem passes, and a slidable pin supportedon said valve stem but disconnected therefrom, extending above theburner in position to be depressed and open said valve when an object isplaced on said supporting means.

2. A heater of the class described comprising a main burner and a pilotburner, a valve casing having a through 0 ening reduced in sizeintermediate its en s, a valve seat being formed at the lower end of thereduced portion, said valve casing having an integral branch forattachment of the gas inlet pipe and a like branch connected to thepilot burner below the valve seat, and an integral branch above thevalve seat connected to the main burner, a valve in said valve casing, astufling box in the upper end of the casing for the stem of said valve,a pin resting on said valve stem for' opening the valve when depressed,a plug in the lower end of said valve casing and a spring in said plugto normally hold the valve seated.

3. A heater of the class described comprising a burner, a valve casinghaving a passage therethrough reduced in size intermediate its ends, anda valve seat at the lower end of the reduced portion, a valve in saidcasing mounted on a valve stem slidable in said reduced portion andguided thereby and extending within the casing, a portion of said valvestem next the valve being cut away to permit the passage of gas when thevalve is open, independent sliding means for opening said valve when anobject is placed over the burner, and means for automatically closingsaid valve when the object is removed.

4 A heater of the class described comprising a burner, a valve casinghaving a passage therethrough reduced in size intermediate its ends, avalve seat at the lower end of the reduced portion, said casing havingformed integral therewith projecting branches each provided with achannel, one n of said channels leading from above said reduced portionof the valve passage to the burner, another to the pilot burner and athird connected to the gas inlet pipe, a valve in said casing mounted ona valve stem slidable in said reduced portion and guided thereby andextending without the casing a portion of said valve stem next the valvebeing cut away to permit the passage of gas when the valve is open,independent sliding means for opening said valve when an object isplaced over the burner, and means for automatically closing said valvewhen the object is removed.

5. A heater of the class described comprising a main burner and a pilotburner, a valve casing, a normally closed gas inlet valve and a valvestem in said casing, said casing being formed with a branch projectingtherefrom and provided with a channel above said valve connected to themain burner, a second branch below the valve for the inlet of gas, and athird channeled branch also below the valve for connecting gas to thepilot burner.

6. A heater of the class described, comprising a main burner and a pilotburner, a valve casing, a normally closed gas inlet valve and a valvestem in said caslng, said casing being formed with an outwardlyprojecting branch above said valve provided with a channel and leadingto the main burner, a second branch below the valve for the inlet ofgas, and a third channeled branch below the valve for conducting gas tothe pilot burner, a vertical rod extending above the burner to open saidinlet valve when depressed, and a spring below the inlet valve to closeit when the pin is free.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

WILLIAM H. VAN HORN.

Witnesses:

JOHN S. COLE, EDGAR J. KEMP.

